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Homework Help: Prove E field does not depend on dielectric (capacitors)

  1. Nov 27, 2014 #1
    1. The problem statement, all variables and given/known data
    "Show that the variation of the potential between the plates of a large parallel plate capacitor remains the same if the air between the plates is replaced by a conductive medium."

    2. Relevant equations
    E = σ/ϵ0 ; C = ϵ0A/d ' C = Q/V ; E = -dV/dx ; R = ρl/A

    3. The attempt at a solution
    I've tried a lot of different things, substituting and replacing variables in the equation to try and get ρ to cancel out, but... I honestly have no idea.
  2. jcsd
  3. Nov 29, 2014 #2


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    Post a couple of the attempts, and maybe someone can point you in the right direction.
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